Deshka Weir 2023 - Chinook

Published

September 21, 2023

Chinook ASL with Quartile Strata

strata asl_dates asl_pct escapement_dates escapement_pct
1 Jun 06 to Jun 18 0.14 Jun 01 to Jun 18 0.23
2 Jun 19 to Jun 22 0.34 Jun 19 to Jun 22 0.21
3 Jun 23 to Jun 25 0.29 Jun 23 to Jun 25 0.30
4 Jun 26 to Jul 14 0.23 Jun 26 to Aug 25 0.26

The KS test indicates that sampling was not proportional to the run. The strata dates were designated according to the OP plan, such that each strata is as close to 25% of the run as possible. These dates could be modified to have passage and sampling percents more closely match.

LRT Tests / Plots - 4 Strata

Likelihood ratio test (G-test) indicates that sex composition does differ between time strata.

     
        F   M Sum
  1    23  29  52
  2    40  85 125
  3    48  59 107
  4    50  33  83
  Sum 161 206 367

    Log likelihood ratio (G-test) test of independence without correction

data:  t.sex
G = 16.371, X-squared df = 3, p-value = 0.0009516

Likelihood ratio test (G-test) indicate age composition does differ between time strata.

     
      1.1 1.2 1.3 Sum
  1    21  18   6  45
  2    48  33  24 105
  3    37  28  20  85
  4    14  27  21  62
  Sum 120 106  71 297

    Log likelihood ratio (G-test) test of independence without correction

data:  t.age
G = 13.938, X-squared df = 6, p-value = 0.03034

ASL TABLES - 4 Strata

Chinook ASL with 3 Strata

strata asl_dates asl_pct escapement_dates escapement_pct
1 Jun 06 to Jun 19 0.22 Jun 01 to Jun 19 0.30
2 Jun 20 to Jun 24 0.47 Jun 20 to Jun 24 0.33
3 Jun 25 to Jul 14 0.31 Jun 25 to Aug 25 0.36

The strata dates were designated such that each strata was as close to 33% of the run as possible. These dates could be modified to have passage and sampling more closely match.

LRT tests - 3 Strata

Likelihood ratio test (G-test) indicates that sex composition does differ between time strata.

     
        F   M Sum
  1    32  48  80
  2    64 110 174
  3    65  48 113
  Sum 161 206 367

    Log likelihood ratio (G-test) test of independence without correction

data:  t.sex
G = 12.564, X-squared df = 2, p-value = 0.00187

Likelihood ratio test (G-test) indicate age composition does not differ between time strata.

     
      1.1 1.2 1.3 Sum
  1    31  29  12  72
  2    59  41  35 135
  3    30  36  24  90
  Sum 120 106  71 297

    Log likelihood ratio (G-test) test of independence without correction

data:  t.age
G = 5.916, X-squared df = 4, p-value = 0.2055

ASL TABLES- 3 Strata

Chinook ASL with NO Strata

ASL TABLES- NO Strata